Exercise: Multivalue parameter with null value for length

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Create a report which allows you to choose:

optionally, a minimum film length; and

one or more languages from a multivalue dropdown.

Your report should list out all films made in the languages you've chosen, lasting longer than the minimum length (if not null). Overleaf shows what this report should look like. Some things to remember:

You'll need two datasets

Don't forget to use the IN keyword, since you're using a multivalue droplist